Ashton Kutcher and Mila Kunis are reportedly ''not done'' expanding their family.

The 38-year-old actor and his actress wife, 33, may have only welcomed their second child Dimitri into the world in November - who is the younger brother of their two-year-old daughter Wyatt - but the pair are reportedly already thinking about baby number three.

A source claimed to HollywoodLife.com: ''Ashton and Mila are not done in the baby making department, and she is eager to start again sooner than Ashton might be ready himself.

''They want a big family, and she feels the sooner the better. As much as she likes to act, she is okay with doing voiceover work to substitute the time to have even more family.

''So don't be surprised when she gets pregnant again.''

The news of a possible third child for the couple - who married in 2015 - may not come as much of a surprise, as the 'Black Swan' actress recently claimed both herself and the 'Jobs' actor ''knew'' their family wasn't ''complete'' when Wyatt was born.

She said: ''I've always said this; I think you know when your family is complete.

''After we had Wyatt, the second that I gave birth, I was like, 'I know that we need to have another baby. We both knew it, we just felt it. And so I always say after the second one, we'll know if we need to have another one.

''I really do believe you know when your family is complete.''

And if the couple do decide to go for baby number three, they might have difficulty coming up with a name, as Ashton recently revealed he wanted to name their son Hawkeye after Benjamin 'Hawkeye' Pierce, a character who appeared on 1970s television show 'M*A*S*H*'.

He said: ''There was a rallying cry from a collective that believed in the name Hawkeye.

''A kid named Hawkeye, it could be 'M*A*S*H*'-y, like he could be a doctor.''